Seal-lock



(No Model.)

C. A. MARSHALL.

SEALLOCK.

Patented Jan. 3, 18

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UNITED STATES PATENT OEEICE.

CHARLES ALBERT MARSHALL, OF LOWELL, ASSIGNOR OF ONE-HALF TO VILLIAM H. BARTLE'IT, OF NEW BEDFORD, MASSACHUSETTS.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 375,886, dated January 3,1888.

(No model.)

To all whom it may concern; f

Be it known that I, CHARLEs. ALBERT MAE- sHALL, residing at Lowell, in the count-y of Middlesex and Slate of Massachusetts,have invented certain new and useful Improvements in Seal-Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to seal-locks of that character in which the seal is defaced in the act of opening the lock.

The invention consists inthe combination of mechanism constituting the lock, which is hereiuafter described and claimed.

In the drawings, Figure l is a face view of the improved lock minus the keyhole escutcheon. Fig. 2 is an end view of same. Fig. 3 is a perspective view of the lock, (part of the shackle being broken away,) showing the sealplate swung open. Fig.4 is a plan of the lock with face-plate removed. Fig. 5 is a central erolsssection on linexx, Figs. l and 2. Figs.V 6, 7, and 8 are details of parts. Fig. 9 is aview of the seal. Fig. 101s a face view; and Fig. 11, a section showing key-hole eseutcheon, which may be attached to the seal-lock.

A indicates the casing ofa seallock, which does not differ greatly from usual seal-locks.

rlhe shackle B is pivotcd to the casing in a manner well known in padlocks. The shackle B has a tapered end, O, and a notch, D,which engages with boltE when the shackleis closed. Bolt E is pressed forward by spring F, so as to engage the notch in the shackle B whenever free todo so. The bolt E has a projection, G, which is engaged by a projecting stud or boss, H, on disk I whenever the said disk is rotated, the disk I being pivoted at K about centrally of the lock, and being of such diameter that the projection H will rotate under the body of bolt E, but will engage the projection G thereon. A stop, L, prevents the complete rotation of the'disk I, and serves also as a guide to the bolt E, which is further supported by guide L. A springbolt, M, directly in line of movement of the free end of shackle B, is notched at m, the bolt having engaging corners mand m2. This bolt forces back the shackle of the lock when said shackle is released from bolt E, eausin g the shackle to liy open.

The faceplate A of the lock has a leaf, A2, hinged thereto at one side, said leaf having a notched pin, A3, projecting in directionl to enter hole a in the face-plate when leaf Az is closed against said face-plate. The pin A is tapered at the end, and when closed into hole a this tapered end will press down the bolt M until the spring My throws the shoulder m2 of said boltinto the notch A4 of the pin A3. The face-plate A and the leaf A2 have each a hole in front of the disk I, so that the pins I may project forward from said disk I, and by means of which pins l disk I may be turned on its pivot.

An escutcheon, O, may be attached to leaf A?, so that the pins I or disk I can only be reached by a key of peculiar construction.

There is a slightspacebetwecn face-plate A and leaf A2 when the latter is closed, so that recess between the face-plate A and leaf A2 of the lock, the pins I I passing through holes Q Q in the seal. The seal may be held against turning by its forni, and also by pins r r,which project from the face-plate.

The operation of locking is as follows: The parts being in the position shown in Fig. 3, the disk I is turned until the pins are in position to enter holes Q Q of a seal. The seal is applied and pressed firmly to its seat in the faceplate of the lock, and the leaf A'l is closed down over the seal. Vhen piu A3 enters hole a, the bolt M is pressed back by the incline on pin A3 until the spring M presses the shoulder m2 of said bolt into the notch A4 of the pin, when the leaf will be locked down over the face-plate and seal. The shackle B now being closed presses back bolts E and M nut-il the shoulder m3 of bolt M enters notch AAL to hold down the leafover the seal. At the same time the spring-bolt E engages the notch D in the shackle ot' the lock. \Vhen the lock is closed in this position, (sce Fig. 1,) the leaf which holds the seal in place cannot be swung back until the shackle B is opened by unlocking. To unlock, turn the disk I by means of pins I I', (either with or without a key.) These pins will tear away the seal I), and when'the disk has rotated far enough it will press back the IOC bolt E by the engagement ofprojections G and H. As soon as bolt E releases the shackle, the spring-bolt M will throw the bolt open; but the shoulder m2 will engage with notch A4 in pin A3 and still hold the leaf A2 closed. To open the leaf, the shackle B is partly closed,and bolt M is thus pressed partly back, when the pin A3 may loe lifted through notch mand the mutilated seal be removed.

The seal P may be of other material than paper, but must be of such material as can be readily torn. Ihin sheets of woodwill answer. The seal may also carry a label or indicati11g-marl;,which will prevent duplication.

I claiml. The combination, with the hinged leaf, its notched pin, and a notched spring-bolt engaging said pin when pressed in either direction frein a central position, of the shackle 'ing through a side aperture in the casing, and

a projection to engage the shacklelocking bolt, and a leaf hinged to the casing and having an aperture through which the pins on the disk 3o extend when the leaf is closed, all substantially as shown aud described.

In testimony whereof I affix my signature in presence of two Witnesses.

OHAS. ALBERT MARSHALL. litiiesses:

CHARLES R. BLAIsDELL, ARTHUR V. MARSHALL. 

